Formation and properties of two-phase bulk metallic glasses by spark plasma sintering

Using a mixture of the gas-atomized Ni52.5Nb10Zr15Ti15Pt7.5 and Fe73Si7B17Nb3 glassy alloy powders, we produced the two-phase bulk metallic glass (BMG) with high strength and good soft magnetic properties as well as satisfying large-size requirements by the spark plasma sintering (SPS) process. Two kinds of glassy particulates were homogeneously dispersed each other. With an increase in sintering temperature, density of the produced samples increased, and densified samples were obtained by the SPS process at above 773 K. Good bonding state among the Ni- and Fe-based glassy particulates was achieved.

Research highlights▶ Two-phase bulk metallic glasses with high strength and good soft magnetic properties as well as satisfying large-size requirements were produced by spark plasma sintering. ▶ Effects of sintering temperature on thermal stability, microstructure, mechanical and magnetic properties were investigated. ▶ Densified samples were obtained by the spark plasma sintering at above 773 K.